Polygon Live: Is Grand Theft Auto the most influential game franchise?

Polygon - "Welcome to our first episode of Polygon Live.

Each episode, I will be joined by a fellow member of Polygon's editorial staff to answer an important, unusual or agitating question related to video games. As the show moves forward I hope to hand off hosting duties, so that more Polygon team members across the globe have an opportunity to speak with you directly via video."
(Culture, Grand Theft Auto)